Apparatus for the magnetic separation of ores and other material.



G. ULLRIOH. APPARATUS FOR THE MAGNETIC SEPARATION OF ORES AND OTHERMATERIAL.

APPLIOATION FILED JAN. 17,1912.

1,072,277, Patented Sept. 2, 1913.

Z SHEETS-SHEET 1.

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G. ULLRICH.

APPARATUS FOR THE MAGNETIC SEPARATION OF ORES AND OTHER MATERIAL.

APPLICATION FILED JAN.17, 1912.

1072,27? Patented Sept. 2, 1913 F/(L 2 SHEETS-SHEET 2.

Af-romwexg GEORG ULLRICI-I, 0F MAGDEBURG, GERMANY.

APPARATUS FOR THE MAGNETIC SEPARATION OF ORES AND OTHER MATERIAL;

To all whom it may concern Be it known that I, Gnono ULLRIGH, a sib'ectof the King of Bavaria, and resident o vented certain new and usefulImprovements in or Relating to Apparatus for the Magnetic Separation ofOres and other Material, of which the following is a specification.

This invention relates to apparatus for. the magnetic separation of oresand other material, and constitutes an improvement in or a modificationof the apparatus described an adjacent magnet s in the specification ofmy prior application Serial No. 445852 filed July 29, 1908. In order tocarry the se aration of the mate rial as far as ractica le with theapparatus referred to a ove it is necessary that the lines of forcepassin from one magnet to fiould pass through the rotating armature andflow therein without meeting unnecessary resistance. The dimensions ofthe armature in cross-section must be calculated accordingly and it hasbeen found that in the above ty e of apparatus, the cross sectional areaof the armature must be at least half as root as that of the magnetcore. This ren ers the dimensions and the weight of the armaturerelatively large and therefore a correspondingly large mechanical effortis necessary for rotating the same. It has also been found in the abovetype of apparatus that highly magnetic material adheres firmly to therotating armature even outside the magnetic field so that the carryingaway of the magnetic material after separation is impeded.

The present invention has for its object to economize in the expenditureof mechanical efi'ort and to facilitate the carrying away of themagnetic material after separation.

According to this invention the magnetizable rings serving as thearmature and counter-pole for the lower magnets instead of beingrotatable are stationary and the carrying away of the separated magneticmate rial is effected by a rotating member arranged between thearxnature rin s and the lower fixed magnets. The sai rotating member ismounted coaxiall with the rings and maybe axially adjusta le. Preferablythe cross section of the rotating member is such that the contourthereof corresponds with the contour of the lower part of the armaturerings.

One way of carrying the invention into Specification of Letters Patent.

agdeburg, v(Jlernaan Empire, have in-' Patented Sept. 2, 1913.

Application filed January 17, 1912. Serial No. 671,570.

magnets and the corresponding armature element in side elevation viewedin the direction indicated by the arrow in Fig. 2; the

armature element being however of modified form. F ig. 4 shows invertical section a modified form of the apparatus and Fig. 5 a plan viewof Fig. 4: partly in section on line A-B of Fig. 4 and with therotatable arts turned 45 from their position in i .4.

plurality of magnets 1 provided with a common core are arranged in acircle around a stationary axis and carry pole pieces 2 each of which isenergized by a coil 3. A central shaft 4 the axis of which coincideswith the axis of the magnets is adapted to be rotated by suitablegearing such as that shown.

Double angled supports 5 are fixed .by their lower branches to themagnets 1 their upper branches carrying concentric magnetizable rings 6which serve as the armature andcounter pole for the magnets 1 and can beadjusted axially by means of screws 7. This axial adjustment of thearmature rings 6 can be effected independently of each other in theexample shown. The cross sectional area of the armature rings 6decreases toward the magnets l owing to its tapering formation.

Below the armature rings and between the latter and the magnets 1, amember 8 is provided which in the example illustrated is constituted bya corrugated disk. The member 8 which serves for carrying the separatedmagnetic material, is suspended c0- axially with the armature rings 6 ona disk lows: The material to be separated is delivered to the hopper 11from which it passes through the conveyer channels 12 into the magneticfields. ()n the passage of the material through the field gap of theseveral magnetic fields, the magnetic particles according to theirpermeability are separated into the zones formed by the several armaturerings 6. The non-magnetic material passes along the conveyer channels12, while the magnetic material adheres firmly to the lower face of therotating member 8 andis thus carried outsidethe magnetic fields,whereupon it falls in the space between each pair of adjacent magnets 1.In order to eliminate any magnetic action of the armature rings 6 whenpassing over the said spaces and thus prevent the magnetic material'frombeing carried too far, the armature'rings 6 may be shaped as shown inFig. 3vwherein they are provided with recesses 13 ofthe same width asthat of'the space between two adjacent magnets.

The construction of the apparatus is not confined to the exampledescribed above and illustrated in Figs. 1, 2 and 3; on the contrary alarge number of other constructions both for the apparatus as, a wholeand for its several parts can be advantageously adopted. For example itis not absolutely necessary that the rotating carrying member 8 shouldbe corrugated as it might be given the form of a plain disk. It is,however, advantageous forthe shape of 'the car rying member 8 tocorrespond to the contour of the lower parts of the armature rings 6.The number of the armature rings 6 depends upon the number of themateria s to be separated, and the adjustment of the said rings maybesuch that several or all of them can be adjusted simultaneously. Thearrangement and construction of, the carrying member 8 can also bemodified in such a manner that it is adjustable in relation to each ofthe zones formed bythe armature rings 6, so that it can be adjustedindependently of or simultaneously with respect to several of or (asshown) all of the zones.

. In place of continuous armature rings, separate 'ring elements can beemployed in which case they are 'fixed over each of the lower fixedmagnets to a common supporting member adjustable relatively to themagnets. This arrangement renders it pos sible to adjust the zonegraduations'at the same time to difierent sizes in the several and 5. Ina circle about a stationary axis,

are fixedly arranged a plurality of magnets b provided with a commoncore a, which are excited by a winding 0. The magnets 'possess each twosuperposed poles d and e. The upper poles (Z are provided with aplurality of magnetizable lamellae f, adjustable in the verticaldirection through means of the screws 9 and arranged one behind theother in the direction of the introduction of the values, which lamellaeare sharpened at their lower portions. By the adjustment of the-lamellae each of the individual ma netic fields can be subdivided intoa plurality of Eones of different density. In the middle of the magneticcircuit is mounted an upright shaft 12., which can be set in rotation byany desired driving means. The shaft It carries on its upper end a crossarm a upon which is secured with vertical adjustment, an extracting body7:, arranged between the superposed poles ,0l ande of the magnet b.

The annular extracting bod has a suitable wave-formed section, theimensions and division of the waves of which correspond to the lowerportion of-the section of the ring-piece. For introducing the magneticvalues, any desired delivering apparatus m will serve, which will directthe separating values beneath the extracting body is between the pairsofpoles d and e through the field-gap; v

The mode of operation is as follows The separating values are conductedby the delivery apparatus m into the individual values and the furtherconducting of the magnetizable values take place.

The number of the plate-shaped bodies or lamellae 7 arranged upon theupper pole d, is determined in each instance, according to the number ofthe materials to be separated.

The adjustability of the lamellae f can be so' determined that severalor all may be adjusted simultaneously.

Having thus described my invention, what 7 I claim as new therein anddesire'to secure by Letters Patent is:

' 1. In a magnetlc separator, means for producing a plurality ofmagnetic fields in a circle about a vertical axis, each magnetic fieldtwo stationary poles of which the upper pole comprises lamellaeadjustable vertically and independently of each other, said amellaebeing downwardly sharpened,

for the purpose of providing, in each magnetic field, a plurality ofsingle adjustable zones and an extracting body revolving between saidpoles, said extracting body being corrugated to conform in shape withthe sharpened part of said lamellee, and means for conveying thematerial to be separated between the upper and the lower poles.

2. In a magnetic separator, means for producing a plurality of magneticfields in a circle about a vertical axis, in each magnetic field twostationary poles of which the upper pole comprises lamellee adjustablevertically and independently of each other, said lamellae beingdownwardly sharpened, for the purpose of providing, in each magneticfield, a plurality of single adjustable zones and an extracting bodyrevolving between said poles, and means for conveying the material to beseparated between the upper and the lower poles; said extracting bodyhaving an undulated radial section corresponding to the sharp pointedlamellae.

3. In a magnetic separator, a plurality of stationary lower polesarranged in a circle about a vertical axis, a plurality of non revolubleupper pole rings concentrically arranged about said axis above saidlower poles, a common carrying frame for said pole rings, a revolubleextracting body he neath' said pole rings, said extracting body beingcorrugated to conform in shape with the sharpened. part of saidlamellte; and means for conveying the material to be separated inbetween the poles; said pole rings being axially adjustable independentof each other and each being provided with a sharp downward edge. I

4. In a magnetic separator, a plurality of stationary lower polesarranged in a circle about a vertical axis, a plurality of non revolubleupper pole rings concentrically arranged about said axis above saidlower poles, a common carrying frame for said pole rings, a revolubleextracting body heneath said pole rings; and means for conveying thematerial to be separated in between the poles, said pole rings axiallyad 'iustable independent of each other and each being provided with asharp downward edge, and recesses being formed on the under side of saidextracting body between said rings.

In a magnetic separator, a plurality of stationary lower poles arrangedin a circle about a vertical axis, an upper stationary pole above eachof said lower poles, said upper pole comprising a plurality ofmagnetizablc plate-like elements sharpened donmwardly, said elementsbeing vertically adjustable relative to each other and to said upperpole and being arranged one behind .vi the other in the direction of theintroduction of the material to be separated; a common carrying memberfor said elements conduct ing the magnetic forces, a common extractingbody revolving beneath all of said elements and means for conveying thematerial to be separated beneath said extracting body, said extractingbody being corrugated to conform in shape with the sharpened part ofsaid lamellac.

6. In a magnetic separator,relatively fixed upper and lower magneticrings, vertical electromagnets having one ring for their yoke and theother ring for their armature, from the latter of which rings the endsof the cores of the magnets are separated by an air gap, the magneticcircuits being through adjacent cores and the two rings and across thegaps, conveyors ar 'anged in the gap to transfer the material to beseparated between the axial portion of the rings and places exteriorthereto, and a collecting apron rotatable in the gap and above theconveyer.

7. In a magnetic separator, a series of fixed vertical clectro-1nagnctsarranged symmetrically about a common axis, an armature separated fromthe free ends of the cores by an air-gap, the armature and the said freeends of the cores forming opposing magnetic poles, one of which isprovided with are shaped corrugations facing the other, conveyersarranged in the gap to transfer the material to be separated be tweenthe axial portion of the rings and places exterior thereto, and acollecting apron rotatable in the gap and above the conveyers, the apronhaving corrugations corresponding to the said arc shaped corru gations.

8. In a magnetic separator, means for establishing a substantiallyvertical flow of flux through an air gap, means for conveying materialthrough such gap, and a corrugated apron movable at right angles to theconveyed material and having wedge-shaped ribs concentric with the axisof rotation of the apron.

t). In a magnetic separator, means for establishing a substantiallyvertical How of flux through an air gap, the upper pole of such gaphaving wedge-shaped concentric ribs, means for conveying materialthrough the gap, and an annular corrugated apron movable at right anglesto the conveyed material, the corrugations of the apron substantiallyfitting the ribs of the pole,

The foregoing specification signed at ll [agdeburg this 21st day ofDecember, 1911.

GEO RG ULLRICH.

In presence (if-

